//The MIT License (MIT)
//
//Copyright (c) 2018 dote
//
//Permission is hereby granted, free of charge, to any person obtaining a copy of
//this software and associated documentation files (the "Software"), to deal in
//the Software without restriction, including without limitation the rights to
//use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
//the Software, and to permit persons to whom the Software is furnished to do so,
//subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in all
//copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
//FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
//COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
//IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
//CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package com.github.dote.mio.protocal;

import java.io.UnsupportedEncodingException;

public class CharsetHelper {
    public final static String ENCODE_CHARSET = "UTF-8";
    public final static String DECODE_CHARSET = "UTF-8";

    public static String getString(byte[] b, int len) {
        try {
            return new String(b, 0, len, DECODE_CHARSET);
        } catch (UnsupportedEncodingException e) {
            return new String(b, 0, len);
        }
    }

    public static String getString(byte[] b, int start, int len) {
        try {
            return new String(b, start, len, DECODE_CHARSET);
        } catch (UnsupportedEncodingException e) {
            return new String(b, start, len);
        }
    }

    public static byte[] getBytes(String str) {
        if (str != null) {
            try {
                return str.getBytes(ENCODE_CHARSET);
            } catch (UnsupportedEncodingException e) {
                return str.getBytes();
            }
        } else
            return new byte[0];
    }
}
